The correct answer is (a) All of the mentioned.
The advantages of a compensated differential amplifier include all the following:
1. Balanced Op-amp - Compensation ensures that both input stages are matched, reducing offset voltage and improving common-mode rejection.
2. Slightly Complex Circuit - While the circuit is more complex than an uncompensated version, this additional complexity provides significant benefits in terms of performance and stability.
3. Does Not Affect CMRR - Proper compensation does not negatively impact the Common Mode Rejection Ratio, maintaining the amplifier's ability to reject common-mode signals.
Compensation in differential amplifiers involves using matched resistors and capacitors to nullify input offset voltage and thermal drift effects. This comprehensive approach addresses multiple performance parameters simultaneously, making compensated designs superior for precision applications.